Allow different hostname to be set

README.md

@@ -36,3 +36,13 @@ This can be done by adding cartodb.localhost alias to your hosts file. For examp
 sudo sh -c 'echo 127.0.1.1 cartodb.localhost >> /etc/hosts'
 ```
 (For Windows it will be `C:\Windows\System32\drivers\etc\hosts`)
+
+How to use a different hostname:
+--------------------------------
+
+For example to use `cartodb.example.com` as a hostname start with:
+```
+docker run -d -p 80:80 -e CARTO_HOST=cartodb.example.com sverhoeven/cartodb
+```
+
+The chosen hostname should also resolve to an IP adress of the machine where the web server is running.

startup.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+CARTO_HOST=${CARTO_HOST=cartodb.localhost}
+perl -pi -e 's/cartodb\.localhost/$ENV{"CARTO_HOST"}/g' /etc/nginx/sites-enabled/default /cartodb/config/app_config.yml /Windshaft-cartodb/config/environments/development.js
+
 service postgresql start
 service redis-server start
 /opt/varnish/sbin/varnishd -a :6081 -T localhost:6082 -s malloc,256m -f /etc/varnish.vcl